Fused ring compounds, process for producing the same and use thereof
申请人:Takeda Chemical Industries, Ltd.
公开号:US06420375B1
公开(公告)日:2002-07-16
To provide a novel compound of the formula:
[wherein A1 ix a 5 or 6-membered ring which may be substituted by a group not containing a cyclic group, A2 is an aromatic ring which may be substituted, X is a divalent group, Y is a nitrogen atom or a methine group, Z is an ethenylene which may be substituted or ethynylene, R is a heterocyclic group which may be substituted, provided that 3,4-dihydro-6-[3-(1H-imidazol-1-yl)-1-propenyl]-2(1H)-quinolone and 2-[3-[5-ethyl-6-methyl-2-(benzyloxy)-3-pyridyl]-1-propenyl]benzoxazole are excluded.], or a salt thereof which has steroid C17,20-lyase inhibitory activity, and is useful for preventing and treating mammals suffering from, for example, primary cancer of malignant tumor, its metastasis and recurrence thereof.
Aromatic dienoyl tetramic acids. Novel antibacterial agents with activity against anaerobes and staphylococci
作者:Terry Rosen、Prabhavathi B. Fernandes、Mary A. Marovich、Linus Shen、James Mao、Andre G. Pernet
DOI:10.1021/jm00125a022
日期:1989.5
Streptolydigin (1) and tirandamycin A (2) are typical members of the naturally occurring class of 3-dienoyltetramicacids. These compounds, which possess potent antibacterial activity particularly against anaerobes, have been shown to inhibit bacterial RNA polymerase. In contrast, tenuazonic acid (5), which lacks a complex dioxabicyclononane moiety and diene chromophore present in 1 and 2, exhibits
Vanadium-Catalyzed Asymmetric Epoxidation of Allylic Alcohols in Water
作者:Andrei V. Malkov、Louise Czemerys、Denis A. Malyshev
DOI:10.1021/jo900294h
日期:2009.5.1
Asymmetric V-catalyzed epoxidation of allylic alcohols can be carried out in water with chiral ligands, which incorporate sulfonamide and hydroxamic acid fragments. Furthermore, the reaction, notorious for its ligand-deceleration effect, in water turned into the ligand-accelerated process. By using this aqueous protocol, a range of allylic alcohols were epoxidized with up to 94% ee.